void Enemy::shoot()
{
Vec2f targetPos = target->get_pos();
aimAt(targetPos.x,targetPos.y);
Vec2f pos = body.get_position();
missile.set_angle(turret_angle);
missile.set_pos(pos);
missile.fire();
time_since_last_shoot=0;
}
void Enemy::update(int time_elapsed_ms)
{
enemy.update(time_elapsed_ms);
float time_elapsed = time_elapsed_ms * 0.001f;
time_since_last_shoot+=time_elapsed_ms;
pos = body.get_position();
if(time_since_last_shoot>2000)
{
shoot();
}
else
{
Vec2f tpos = target->get_pos();
aimAt( tpos.x,tpos.y);
}
if(is_dead || pos.x<-30)
{
remove_enemy(this);
game->add_for_deletion(this);
update_callback.clear();
}
}
void ShootingAI::think(double dt) {
// Whether or not the ship should fire.
bool shouldFire = false;
// If the ShootingAI isn't enabled, or there's no gamestate, skip shooting.
if(!enabled || ship->gameState == NULL) {
return;
}
/* Also, do we want to try and rechoose a target every think (ie frame)?
* If not, it would make the shooter a little quicker, but may end up
* shooting at bad targets (if the gun is pointed in the opposite direction,
* it will take time to rotate it around to shoot the target, then
* time to kill the asteroid, and throughout all this time a new asteroid
* could have become a better target, or even a critical target)
*
* Just an idea, we will talk it over.
*/
if (targetID != -1) {
target = ship->gameState->custodian[targetID];
}
/* If there is no target, or we need to choose a target b/c the old one
* went off screen, or if the timer is up and we're allowed to switch
* targets.
*/
if (target == NULL || needToChooseTarget || (targetSwitchTimer.isRunning && targetSwitchTimer.getTimeLeft() <= 0)) {
target = chooseTarget();
// If there was nothing on screen, target could have wound up NULL
if (target != NULL) {
targetID = target->id;
targetSwitchTimer.restartCountDown();
// If the chosen target is a Shard, remember that till the next time we choose a target.
if (target->type == TYPE_SHARD)
targetIsAShard = true;
else
targetIsAShard = false;
}
}
// If it's been more than weaponSwitchSpeed seconds, we can switch weapons.
// Don't bother choosing a weapon if target is NULL
if (target != NULL && weaponSwitchTimer.isRunning && weaponSwitchTimer.getTimeLeft() <= 0) {
prevWeapon = ship->getCurrentWeapon();
chooseWeapon(target);
// If we chose a new weapon, reset the timer so we can't switch again soon.
if (prevWeapon != chosenWeapon) {
weaponSwitchTimer.restartCountDown();
}
}
// If we've got an actual target
if (target != NULL) {
// aimAt aims the cursos and returns whether or not the ship is ready to fire.
shouldFire = aimAt(dt, target);
// Make sure we don't fire incorrect weapons at shards.
if (targetIsAShard) {
// If the current weapon is not a tractor beam.
if (ship->currentWeapon != TRACTOR_WEAPON_INDEX) {
// Don't fire.
shouldFire = false;
}
}
ship->fire(shouldFire);
}
// Otherwise we've got no target
else {
// Aim the cursor in front of the ship
aimCursorAtMiddle(dt);
// Make sure we stop firing.
ship->fire(false);
}
}
